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【单选题】
若所有print方法均为static，则其结果输出为A.
Manager Employee
B.
Person Person
C.
Manager Person
D.
Person Manager
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相关题目：
【单选题】$\lim_{x\to \frac{\pi }{3}} \, \frac{\sin (x)}{\cos (x)+1}$
A.
$\frac{1}{\sqrt{3}}$
B.
$-\frac{1}{\sqrt{3}}$
C.
$\frac{1}{2}$
D.
$-\frac{1}{2}$
【单选题】Why does the memory becomes smaller and smaller?内存“越来越小”的原因是：
A.
With more and more processes running on one computer, the average memroy size for each process is getting smaller 机器上运行的程序越来越多，平均每个程序使用的内存变小
B.
The real-world applications call for rocketing memory storage 实际应用对存储的需求急剧增长
C.
The silicon used for producing chips is soon running out 用于制造内存芯片的硅资源消耗殆尽
D.
The physical size of memory chips is getting smaller thanks to the advances in technology 随着工艺的进步，内存的体积变小，集成度变高
【单选题】How to engage in other people’s discussion in a seminar when you are not fully prepared?
A.
Follow the lecture closely and look for opportunities to ask relevant questions.
B.
Pretend you’re fully prepared and listen carefully
C.
Ask people around for help
D.
Record all the lecture and learn it later by yourself
【单选题】$\lim_{x\to 1} \, \frac{x^3-1}{x^4-1}$
A.
$1$
B.
$\frac{3}{4}$
C.
$\frac{4}{3}$
D.
$-1$
【单选题】The baby carrying the DNA of three parents is an experimental specimen, aiming at ______.
A.
having more babies
B.
having babies with genetic modification
C.
eliminating genetic diseases in newborns
D.
innovating in the field of life science
【单选题】B-trees are 树结构上的特点是：
A.
short and chubby, with each node having at most two children矮胖，每个节点至多两个孩子
B.
short and chubby, with each node having potentially many children矮胖，每个节点可有多于两个孩子
C.
tall and slim, with each node having at most two children瘦高，每个节点至多两个孩子
D.
tall and slim, with each node having potentially many children瘦高，每个节点可有多于两个孩子
【单选题】In the Student Research Project part, in which ______ had a deeper discussion on the intriguing topic of “the world’s first baby born with the DNA from 3 parents”.
A.
Alex, Abbas, Alice and Ruohui.
B.
Alex, Abbas, Jiehan and Billy.
C.
Alex, Abbas, Alice and Saba.
D.
Alex, Abbas, Jiehan and Huanrui.
【单选题】根据本题题干回答以下（1）（2）（3）题已知5只动物中有1只患有某种疾病，需要通过化验血液来确定患病的动物，血液结果呈阳性的即为患病动物，呈阴性的即没有患病。下面是两种化验方案：方案甲 逐个化验，知道能确定患病动物为止方案乙 先任取3只，将它们的血液混在一起化验。若结果呈阳性则表明患病动物为这3只中的1只，然后再逐个化验，知道能确定患病动物为止；若结果呈阴性则在另外2只中任取1只化验。（1）、求方...
A.
1/5
B.
2/5
C.
1/2
D.
3/5
【单选题】B-trees have small height so as to B树的层数少有助于：
A.
reduce the number of I/O operations 减少I/O次数
B.
reduce the time consumption for a single I/O 减少每次I/O的时间
C.
reduce the asymptotic time complexity for seaching 降低查找的渐进时间复杂度
D.
reduce the storage requirement 节省存储空间
【单选题】In the Academic Writing part, Alex discussed with Ruoqi on academic skills, such as ______.
A.
plagiarism, paraphrasing and summarizing
B.
plagiarism, paraphrasing and synthesizing
C.
how to avoid plagiarism, paraphrase and summarize
D.
how to avoid plagiarism, paraphrase and synthesize
【单选题】If it would take us a second for a single memory access, how long would it cost for a single access to the external storage?如果说访问一次内存需要1秒，则一次外存访问大概需要：
A.
a hour 1小时
B.
a day 1天
C.
a month 1月
D.
a year 1年
【单选题】$\lim_{x\to \infty } \, \left(\sqrt{x+\sqrt{x+\sqrt{x}}}-\sqrt{x}\right)$
A.
$0$
B.
$1$
C.
$\frac{1}{2}$
D.
$2$
【单选题】$\lim_{n\to \infty } \, \frac{\ln (n)}{\ln (3 n)}$
A.
$\frac{1}{3}$
B.
$3$
C.
$1$
D.
不存在
【单选题】Through the group discussion between ______ , we figured out the differences between adolescence and adulthood.
A.
Abbas, Zuowan and Jialin
B.
Billy, Xuanhui and Jialin
C.
Abbas, Xuanhui and Jialin
D.
Billy, Xuanhui and Zixiao
【单选题】In the main part of Text A, ______ showed us some opinions on the relationship between musical experiences and intelligence.
A.
Kamlesh
B.
Jason
C.
John
D.
Abbas
【单选题】What's the time complexity for searching in a B-tree of order 4 and size n?在存储了n个元素的4阶B树中查找，单个节点进行一次查找的时间复杂度为：
A.
O(1)
B.
O(lgn)
C.
O(n)
D.
O(nlgn)
【单选题】下面说法正确的是
A.
FileWriter类是Writer类的子类
B.
FileWriter类是OutputStreamWriter类的子类
C.
FileWriter类是FileOutputStream类的子类
D.
Wirter类是OutputStreamWriter类的子类
【单选题】How many children are there for each node in a B-tree of order 4?4阶B树中每个节点的分支数为：
A.
1~4
B.
2~5
C.
2~4
D.
3~5
【单选题】During the conversation between Billy, Yuege and Yunpeng, we took a brief look at ______ .
A.
brain development
B.
brain degradation
C.
human evolution
D.
human degeneration
【单选题】口袋中有5个球，编号为1,2,3,4,5。从中任取3个，以X表示取出的3个球的最大号码。则P(X=4)=()
A.
1/10
B.
3/10
C.
5/10
D.
7/10
【单选题】What's the return value for a failed search in a B-tree of order 4?B树查找算法若最终失败，返回值为：
A.
None
B.
NULL
C.
A pointer to the last examined node 指向最后一个所查找节点的指针
D.
A pointer to the root 指向根节点的指针
【单选题】What's the height of a B-tree of order 128 relative to a corresponding BBST?若B树的阶m=128，则它的高度大致是对应的BBST的：
A.
1/5
B.
1/6
C.
1/7
D.
1/8
【单选题】$a_1=\sqrt{2},a_2=\sqrt{2+\sqrt{2}},\dots,a_n=\sqrt{2+a_{n-1}}$当$n \rightarrow \infty$时极限
A.
存在
B.
不存在
【单选题】设随机变量\( X \)服从区间（0,2）上的均匀分布，则\(P(X^2>2) \)=（）
A.
$\sqrt2/2$
B.
$\sqrt2$
C.
$1-\sqrt2/2$
D.
$1-\sqrt2$
【单选题】Which of the following is NOT the reason why she does not like to take photos with the camera?
A.
It was easy to break
B.
It was too heavy
C.
it is easy to get stolen
D.
it is too expensive
【单选题】What “eat earth” means?
A.
Having to spend less after spending a lot during the shopping festival.
B.
Living a luxurious life after earning a lot of money.
C.
Having failed to live a modest life.
D.
Living a luxurious life.
【单选题】Popular novels can be adapted and made into ____; ____ and _____.
A.
films; television programs; video games
B.
cartoons; dramas; games
C.
websites; televisions; audio programs
D.
films; cartoons; games
【单选题】下面说法中错误的是
A.
FileReader类是Reader类的间接子类
B.
InputStreamReader类是Reader类的子类
C.
BufferedReader类可以读取一行
D.
BufferedReader的readLine()函数，如果没有数据时会返回0
【单选题】What's the 'overflow' for a B-tree?B树的上溢是指：
A.
The property of a B-tree is violated due to removing a key 删除关键码后违反了B树的性质
B.
The property of a B-tree is violated due to inserting a key 插入新的关键码后违反了B树的性质
C.
The property of a B-tree is violated due to a split 分裂后违反了B树的性质
D.
A B-tree becomes too high B树的高度过高
【单选题】设随机变量服从区间（0,2）上的均匀分布，则$Y=X^{2}$在（0,4）上的密度函数为（）
A.
$\frac{1}{3\sqrt{y}}$
B.
$\frac{1}{\sqrt{y}}$
C.
$\frac{1}{2\sqrt{y}}$
D.
$\frac{1}{4\sqrt{y}}$
【判断题】法国“戴高乐”号航母的末端防御武器有：“紫苑”舰空导弹，其有效射程是30千米；还有“西北风”舰空导弹，有效射程是4千米。“戴高乐”号航母的末端防御武器，可以有效拦截来袭的反舰导弹等武器。
A.
正确
B.
错误
【单选题】Which consequence follows as a B-tree becomes higher?B树高度的增加一定伴随着：
A.
Each node has a larger number of keys 每个节点所存放的关键码数量增加
B.
Each node has a smaller number of keys 每个节点所存放的关键码数量减少
C.
Splitting to the root 分裂到根
D.
Splitting to the leaves 分裂到叶
【单选题】令$f(x)=\frac{x^{2}}{1+x^{2}}$,则它的不定积分为（）
A.
x-arccotx+c
B.
x-arccosx+c
C.
x-arcsinx+c
D.
x-arctanx+c
【多选题】Gardening is ______.
A.
a great daily exercise
B.
a great way to keep your lawn beautiful
C.
a great way to keep you healthy
D.
landscape painting
【单选题】Choose the most appropriate answer by completing the sentences below or answering the questions.1. Why is Billy a bit disappointed about the film?
A.
The quality of the film is comparable with the novel itself.
B.
The movie is unbelievable, for the plot is not true to the novel.
C.
The stories producers and directors tell are unbelievable.
D.
While adapting the original novels into films, producer exaggerated too much.
【单选题】The differences between the original novel and their adapted film depend on _______, _______ and _______.
A.
writers; actors; audience
B.
writers; actors; producers
C.
directors; actors; audience
D.
directors; producers; audience
【单选题】The underflow of a B-tree happens whenB树的下溢发生于：
A.
the height of the tree decreases B树高度减少
B.
the property of the B-tree is violated due to inserting a key 插入关键码后违反了B树的性质
C.
the property of the B-tree is violated due to deleting a key 删除关键码后违反了B树的性质
D.
inserting a key to a leaf node 在叶节点插入关键码
【单选题】The height of a B-tree decreases only whenB树高度的减少只会发生于
A.
merging two children of the root 根节点的两个孩子合并
B.
removing the root 根节点被删除
C.
rotating the root 根节点发生旋转
D.
there are multiple keys in the root 根节点有多个关键码
【单选题】Literature shows the story with languages so that readers can have more _______.
A.
consideration
B.
depression
C.
imagination
D.
inspiration
【单选题】Why do Amanda and Zheyu feel very down today?
A.
They are worried about homework.
B.
They are worried about exams.
C.
They are worried about interviews.
【多选题】以下哪种说法是正确的——
A.
人生观是对人生目的、意义的根本看法
B.
世界观是人生观重要组成部分
C.
价值观是人生哲学的核心，是人与人之间对于人生价值的不同看法
D.
哲学只是关于世界观的学问
【单选题】What does “be apt to do something” mean?
A.
be more likely to do something
B.
be angry to something
C.
be happy to do something
D.
be taught to do something
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